Improvement in spring-scales



W. B. & J. S.'ROSS. Spring-Scales.

No. 200,765 Patented Feb. 26,1878

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N. PETERS, Fl IOTQ-UTHOGRAFHER, WASHINGTON D C.

UNITED STATES PATENT OFFICE.

WILLIAM B. ROSS AND JAMES S. ROSS, OF NASHVILLE, TENNESSEE, ASSIGNORS OFONE-HALF THEIR RIGHT TO EDWARD R. CAMPBELL AND HARRY HARRISON, OF SAMEPLACE.

IMPROVEMENT IN SPRING-SCALES.

Specification forming part of Letters Patent No. 200,765, dated February26,1878; application filed September 27, 1877.

To all whom it may concern:

Be it known that we, WILLIAM B. Ross and JAMES S. Ross, of Nashville, inthe county of Davidson and State of Tennessee, have invented a new anduseful Improvement in Spring-Scales, for weighing mail matter and otherlight articles, which improvement is fully set forth in the followingspecification and accompanying drawings, in which- Figure l is aperspective view, Fig. 2 is a front view, and Fig. 3 is a side view, ofthe invention.

In the drawing, S S are the springs, of flat steel, bentin the mannershown, and attached to the handle H, which may be screwed to a support,if desired.

The springs are marked on the graduation side G with lines showing thenumber of units of weights of the articles to be weighed.

P is a pan for holding articles to be weighed. L L are hooks for holdingletters. D is a hook upon which to hang anything suited to suchasupport. 0 is a spring-catch to prevent the hook or scale-pan fromshaking away from the hook E. B B are stops fastened to the springs S S,to prevent them from bending to the extent of injury or breaking.

The invention is so constructed that the price of sendingletters by mailcan be marked on the side of the springs S S opposite the graduated sideG.

It will be seen from the foregoing that when a weight is attached tohook D or placed in the scale-pan I, and the scales are supported by thehandle H, the ends of the springs S S, at E, will be drawn downward; andif they are properly graduated the weights and the cost of postage maybe read off from the number of the graduations nearest the handle H.

It will be seen that when the stops B B touch the handle H the springscan be drawn down no farther, thus securing them against breaking.

Having thus described our invention, what we claim as new, and desire tosecure by Let tcrs Patent, is-

The combination, in a spring-scale, of the springs S S, handle H,graduations G, pan P, hooks L L, hook D, spring-catch (J, and stops B B,all arranged substantially as described and shown.

E. S. WHEAT.

